xdump 0.3.0

XDump

XDump is an utility to make partial consistent dump and load it into the database.

The idea is to provide an ability to specify what to include in the dump via SQL queries.

Installation

XDump can be obtained with pip:

$ pip install xdump

Usage example

Making a dump (on production replica for example):

>>> EMPLOYEES_SQL = 'SELECT * FROM employees ORDER BY id DESC LIMIT 2'
>>> from xdump.postgresql import PostgreSQLBackend
>>> backend = PostgreSQLBackend(dbname='app_db', user='prod', password='pass', host='127.0.0.1', port='5432')
>>> backend.dump('/path/to/dump.zip', full_tables=['groups'], partial_tables={'employees': EMPLOYEES_SQL})

from xdump.postgresql import PostgreSQLBackend
>>> backend = PostgreSQLBackend(dbname='app_db', user='local', password='pass', host='127.0.0.1', port='5432')
>>> backend.load('/path/to/dump.zip')

RDBMS support

At the moment only the following are supported:

• PostgreSQL

• SQLite

Django support

Add xdump.extra.django to your INSTALLED_APPS settings:

INSTALLED_APPS = [
   ...,
   'xdump.extra.django',
]

Add XDUMP to your project settings file. It should contain minimum 2 entries:

• FULL_TABLES - a list of tables, that should be fully dumped.

• PARTIAL_TABLES - a dictionary with table_name: select SQL

XDUMP = {
    'FULL_TABLES': ['groups'],
    'PARTIAL_TABLES': {'employees': 'SELECT * FROM employees WHERE id > 100'}
}

Optionally you could use a custom backend:

XDUMP = {
    ...,
    'BACKEND': 'importable.string',
}

Run xdump command:

$ ./manage.py xdump dump.zip

Run xload command:

$ ./manage.py xload dump.zip

Possible options to both commands:

• alias - allows you to choose database config from DATABASES, that is used during the execution;

• backend - importable string, that leads to custom dump backend class.

The following make command could be useful to get a configured dump from production to your local machine:

sync-production:
    ssh -t $(TARGET) "DJANGO_SETTINGS_MODULE=settings.production /path/to/manage.py xdump /tmp/dump.zip"
    scp $(TARGET):/tmp/dump.zip ./dump.zip
    ssh -t $(TARGET) "rm /tmp/dump.zip"
    DJANGO_SETTINGS_MODULE=settings.local $(PYTHON) manage.py xload ./dump.zip

And usage is:

$ make sync-production TARGET=john@production.com PYTHON=/path/to/python/in/venv

Python support

XDump supports Python 3.4, 3.5 & 3.6.